Ventilator.



R. R. FREER.

VENTILATOR. APPLlcATmN mep Mmm. 191s.

Patented Jan. 21,1919. f7

n.: wenn uns m. mmzmm. summum. n. c.

preferred ROBERT' R. FREER, 0F CLEVELAND, OHIO.

j VENTILATOR.

Specification of Letters Patent.

\ Patented Jan. 21, 1919.

Application led March 16, 1918. Serial No. 222,894.

f 'ToaZZ whom t may concern:

"-Beit known th'at I, ROBERT'R. FREER, a citizen'of fthe UnitedStates, and a resident of Cleveland, in the county of Cuyahoga 'and fState of- Ohio," have invented certain new and useful Improvements in Ventilators, of which thefollowmg isa 'specification.

the vehicle.

The invention further aims at a device embodying thesefe'atures which includes an adjustable part adapted to be shifted for adapting 'the device for operation upon the movement of the vehicle either forwardly or rearwardly.

` The-invention'further aimsl at theprovision of adevice of'this character which embodies relatively few parts of simple construction, and which may be economically constructed and assembled.

The above, and various other objects and advantages of this invention'will be in part described, and in' partunderstood, from the following detailed description of the present embodiment, the same being illustrated in the `accompanying drawing, wherein:

` Figure 1 is a .horizontal lsection taken longitudinally throughy a ventilator constructed according to the present invention.

vFig. 2 is an end elevation of the same.

Fig. 3 is a transverse sectional view taken substantially centrally throughthe device.

Fig. 4 is a detail plan view of the shiftable member employed.

Referring lto the'drawing, 10 deslgnates a drum or casing which may be constructed of sheet metal, and which is curved into substantially U-shape with outturned flanges 11 at its lateral edges adapted for attachment to a vehicle wall or top A, and provided with end flanges 12.

The Opposite ends of the casing 10 are substantially closed by the provision of a pair of inwardly directed heads of conical form as indicated at .13 and 14, the inner reduced ends of the heads terminating in flaring bell mouths 15 which are spaced-apart within the casing. The heads 13 and 14 are provided at their outer base portions with out the inner ends of turned flanges 16 adapted to bearagainst the flanges 12 of the` casing, andi are covered by =.screens 17 held against the base `portions of the heads 13 andy 14 by clamping the flanges y16 of the heads are riveted or otherwise suitably secured to the flanges 12 ofthe casing.

"An ejector tube 19 is arranged'between the heads 13 and 14, and terminates at opposite ends in tapering nozzles 20 and 21, which project into' the bell-shaped `mouths 15 of the heads, and which are of considerably less diameter than the mouths 15. Machine screwsl 22, or the like, pass inwardly through the mouths 15 and engage in threaded relation with the nozzles20 and 21 to hold the same centrally within the mouths, and spacers 23, in the form of sleeves, surround the screws 22 between the inner walls of the mouths and the exterior-surfaces ofthe nozzles 20 and 21.

The ejector tube 19 is provided with a valve 24 which is `in the'form of a sleeve 'closely fitting the tube' 19 and adapted to slide longitudinally thereon. The opposite ends of the sleeve 24 are provided with tapering plugvheads 25 and 26 adaptedI to fit in the mouths 15, and the sleeve' 24 is of such length that when' the head 25 engages in one of themouths 15, the opposite head 26 isspaced or withdrawn from the opposite mouth. The valve isk adapted to be shifted upon the tube 19 to alternately engage the heads 25 and 2.6` with the bell mouths 15, and a means for accomplishing this result is shown in the drawing, wherein a lever 27 is pivotally mounted upon the vehicle part A,

such as by the provision of the pivot rod B, and the lever'27 extends outwardly into the casing 10 and has forked arms 28 upon its outer ends engaging against the opposite sides of the sleeve 24, and being pivotally connected thereto by'diametrically opposed pins'or trunnions 29 carried upon the valve.

In use, when the vehicle is moving in the direction indicated by the arrow at the top of Fig. 1, the lever 27 is swung to shift the valve 24 forwardly and seat the valve head 25 in the bell mouth 15 and the forced draft formed by the movement of the vehicle compresses air in the cone-head 13 and directs the air into the relatively small tube 19 under considerable pressure. The air is delivered from the rear end of the tube 19 through the nozzle 21, andy into the rear rings 18. The rings 18, the screens 17, andhead 14, where the air is permitted to eX- pand and create a partial vacuum about the nozzle 21. The liow of air from the nozzle 2l also creates a suction or partial vacuum in the annular chamber formed about the nozzle 21, and the air contained in the casing 10 is drawn through the bell mouth 15 of the head 14 to withdraw the air in the vehicle and the casing, or create a current of air therethrough. The screen 17 covering the forward head 13 excludes dust, dirt, particles, and the like, and prevents choking of the forward end of the tube 19.

When it is desired to propel the vehicle 1n an opposite direction, or to otherwise create a draft of air in an opposite direction, through the casing 10, the lever 27 is moved into an opposite position for shifting the valve 24 to close the head 26 thereof in the opposite bell mouth 15, and open or unseat the valve head 25. The ventilator is now in position to operate and eject air from the interior of the casing 10, through the head 13, the head 14 becoming the forward` end.

A ventilator thus constructed prevents the direct flowing of air downwardly through the ventilator into the vehicle, and ei'ects a steady and uniform up draft through the vehicle and the ventilator, to thus remove the gases and fouled air therefrom.

It is of course understood that various changes and modifications may be made in the details of construction or" the above specilically described embodiment of the invention Without departing from the spirit thereof, and being restricted only by the scope of the following claims.

l claim 1. In a ventilator, the combination of a casing adapted for communication with the interior of a vehicle, inwardly directed conical heads closing the opposite ends of the casing having central openings there* through, a tube extending longitudinally m the casing and terminating at opposite ends in the central openings of the heads and being of less diameter than the openings to form annular passages about the ends of the tube, and means for closing the annular pas sages to control the iow of air therethrough.

2. In a ventilator, the combination of a casing adapted for communication with the interior of a vehicle or the like, heads on opposite ends of said casing having nwardly extending mouths, a tube extending longitudinally in the casing and projecting into said mouths and being or" less diameter than the same to form annular passages about the ends of the tube, and a valve shift able upon the tube of less length than the same and provided with heads on opposite ends adapted to alternately engage saidl mouths and close the annular spaces about said tube ends.

8. In a ventilator, the combination of a casing adapted for communication with the interior of a vehicle or the like, inwardly directed heads on the opposite ends of said casing terminating inwardly in mouths spaced-apart within the drum, an ejector tube arranged longitudinally in the casing, and having its ends extending into said mouths and being of less diameter than the same to form annular passages about the ends of the tube, and means for closing said annular channels.

4. In a ventilator for cars,'the combination of a casing having an opening for communication at one side with a car, inwardly directed funnel formed heads at the oppo-.

site ends of the casing, an ejector tube eX tending longitudinally in the casing and having its ends projecting into' the inner open ends of said heads, said tube being supported in spaced relation at all sides from the inner walls of said heads, a sleeve slidable on* said tube and carrying a valve on each end adapted to fit in the annular passages between the tube ends and the open end of said heads. 5. In a ventilator, the combination oi a drum adapted for communication with the interior of a vehicle or the like, inwardly directed heads closing the opposite ends of the drum and having openings establishing communication between the drum and the interior of the heads, a hollow member opening at opposite ends intoV the interior of the heads, and adjustable means for controlling thel communication between the heads and the drum. c

ROBERT R. FREER.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patente.

Washington, D. C. 

